Weather alerts in Oklahoma, 2015
4,664 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 4,664
- Warnings
- 1,857
- Watches
- 190
- Advisories
- 649
- Busiest month
- May1,608 alerts
- Busiest day
- May 9, 2015168 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
81 of 218 tornado warnings covering Oklahoma in 2015 had a tornado report inside them; 99 of 127 tornado reports fell inside a warning, on average 15 minutes after it went out.
Oklahoma, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 218 | 81 | 63% | 127 | 78% | 15 min |
| Severe thunderstorm warnings | 912 | 434 | 52% | 897 | 80% | 23 min |
| Flash flood warnings | 265 | 174 | 34% | 399 | 89% | 134 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 103 | 20 | 81% | 42 | 55% | 11 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 270 | 164 | 39% | 438 | 72% | 24 min |
| NWS Shreveport, LA: flash flood warnings | 115 | 80 | 30% | 274 | 89% | 96 min |
| NWS Norman, OK: tornado warnings | 152 | 54 | 64% | 96 | 80% | 14 min |
| NWS Norman, OK: severe thunderstorm warnings | 661 | 312 | 53% | 662 | 81% | 22 min |
| NWS Norman, OK: flash flood warnings | 135 | 88 | 35% | 195 | 94% | 114 min |
| NWS Tulsa, OK: tornado warnings | 80 | 31 | 61% | 47 | 74% | 16 min |
| NWS Tulsa, OK: severe thunderstorm warnings | 310 | 141 | 55% | 356 | 80% | 24 min |
| NWS Tulsa, OK: flash flood warnings | 139 | 85 | 39% | 270 | 86% | 155 min |
| NWS Amarillo, TX: tornado warnings | 49 | 21 | 57% | 38 | 87% | 19 min |
| NWS Amarillo, TX: severe thunderstorm warnings | 258 | 146 | 43% | 398 | 78% | 27 min |
| NWS Amarillo, TX: flash flood warnings | 29 | 21 | 28% | 54 | 89% | 90 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
4,664 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Grady County317
- Kiowa County314
- Comanche County309
- Tillman County309
- Caddo County303
- Jackson County299
- Muskogee County298
- Cleveland County289
- Cotton County287
- Canadian County281
- McClain County275
- Washita County275
- Oklahoma County273
- Wagoner County271
- Greer County269
- Cherokee County266
- Jefferson County265
- Stephens County262
- Haskell County261
- Latimer County261
- Roger Mills County261
- Carter County260
- Harmon County259
- Pottawatomie County259
- McIntosh County259
- Pittsburg County257
- Tulsa County255
- Okmulgee County251
- Beckham County250
- Pontotoc County250
- Pushmataha County250
- Johnston County249
- Murray County248
- LeFlore County247
- Creek County247
- Custer County245
- Garvin County245
- Bryan County243
- Rogers County243
- Marshall County236
37 more counties
- Atoka County235
- Hughes County233
- Seminole County231
- Love County230
- Dewey County227
- McCurtain County226
- Major County225
- Mayes County225
- Delaware County224
- Blaine County221
- Adair County218
- Craig County218
- Logan County211
- Okfuskee County211
- Ellis County210
- Sequoyah County209
- Kingfisher County206
- Pawnee County205
- Payne County203
- Lincoln County201
- Woodward County201
- Alfalfa County200
- Woods County200
- Coal County199
- Nowata County199
- Washington County198
- Garfield County196
- Ottawa County196
- Grant County192
- Cimarron County191
- Texas County188
- Noble County181
- Harper County181
- Osage County181
- Kay County173
- Choctaw County168
- Beaver County163
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.